Fluidized bed furnace for purifying and removing fly ash of calcium carbide incineration system
By designing a smooth first incline, bellows, heat-resistant hoods, lower ash assembly and lower coal pipes in the boiling furnace, the combustion efficiency and environmental protection problems of the incineration calcium carbide system in the prior art are solved, and an efficient and environmentally friendly ash purification combustion effect is achieved.
Patent Information
- Application Number
- CN202422151393.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-09-03
AI Technical Summary
When the existing boiling furnaces are incinerated with calcium carbide system to purify dust and remove dust, the wall crust is prone to stagnation, the purification ash is not fully burned, the combustion efficiency is not high and does not meet environmental protection requirements.
A boiling furnace including a furnace body, a fire wall, a combustion chamber and a settlement chamber is designed. By providing a smooth first incline, a bellows, a heat-resistant hood, ash assembly and a coal pipe, the combustion path and temperature distribution of the purified ash are optimized.
It improves the combustion efficiency of purified ash, avoids wall crust and fire out, meets environmental protection requirements, and simplifies structural settings.
Smart Images
Figure CN223004974U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fluidized bed boilers, in particular to a fluidized bed boiler for purifying and dust-removing ash in a calcium carbide furnace incineration system. Background Technique
[0002] At present, the common fluidized bed boilers in the industry cannot normally incinerate the purified ash generated by calcium carbide furnaces. A large amount of purified ash generated by calcium carbide furnaces needs to be landfilled, resulting in relatively serious environmental pollution and high treatment costs.
[0003] In the actual process of treating purified ash, there have also been attempts to incinerate purified ash, but in all cases, there have been phenomena of caking and flameout on the walls of the fluidized bed boiler. The purified ash is not fully burned to generate waste gas, the combustion efficiency of the purified ash is not high, and it does not meet the environmental protection requirements.
[0004] Therefore, a fluidized bed boiler for purifying and dust-removing ash in a calcium carbide furnace incineration system is proposed. Content of the Utility Model
[0005] The purpose of the utility model is to provide a fluidized bed boiler for purifying and dust-removing ash in a calcium carbide furnace incineration system to solve the problems raised in the above background technique.
[0006] To achieve the above purpose, the utility model provides the following technical solution: A fluidized bed boiler for purifying and dust-removing ash in a calcium carbide furnace incineration system, including a furnace body. A fire baffle is arranged inside the furnace body, dividing the interior of the furnace body into a combustion chamber and a sedimentation chamber. The fire baffle includes a first inclined surface provided on its lower side wall, and the surface of the first inclined surface is smoothly arranged;
[0007] A wind box and a slag discharge port are arranged at the bottom of the combustion chamber, and a number of heat-resistant wind caps are arranged on the top of the wind box;
[0008] A ash discharging assembly is arranged on the side wall of the furnace body, and the ash discharging assembly includes an ash inlet main pipe, a stop valve, a main ash pipe and a secondary ash discharging pipe;
[0009] The ash inlet main pipe is communicated with the main ash pipe and the secondary ash discharging pipe. The stop valve is used to control the ash discharging amount of the secondary ash discharging pipe, and the bottom end of the main ash pipe is located directly above the heat-resistant wind cap;
[0010] A coal inlet pipe is arranged on the side wall of the furnace body close to the combustion chamber;
[0011] Two secondary ash discharging pipes are arranged, symmetrically arranged on both sides of the coal inlet pipe.
[0012] Preferably: The included angle between the first inclined surface and the vertically upward direction is set as the inclination angle, and the angle range of the inclination angle is 25 degrees to 30 degrees.
[0013] Preferably: Two slag discharge ports are arranged, and the diameter range of the slag discharge ports is 133 mm to 150 mm.
[0014] Preferably, the distance between the bottom end of the main ash pipe and the heat-resistant air cap is 50 mm to 125 mm.
[0015] Preferably, the air box is located at the center of the bottom of the combustion chamber.
[0016] Preferably, the horizontal distance between the secondary lower ash pipe and the coal feeding pipe is 200 mm to 240 mm.
[0017] Preferably, the secondary lower ash pipe and the coal feeding pipe are located on the same side wall of the furnace body.
[0018] Preferably, the coal feeding pipe obliquely passes through the side wall of the furnace body downward, and the main ash pipe and the secondary lower ash pipe obliquely pass through the side wall of the furnace body downward.
[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0020] 1. By setting the surface of the first inclined plane to be smooth, it is ensured that the purified ash is not likely to form a crust on the surface of the first inclined plane during combustion, and thus will not be extinguished due to lack of oxygen, reducing the combustion efficiency of the purified ash.
[0021] 2. Through the setting of the ash discharging assembly, by arranging the secondary lower ash pipes on both sides of the coal feeding pipe, not only the amount of purified ash entering the combustion chamber from the main ash pipe is reduced, but also the purified ash input from the bottom end of the main ash pipe is more easily blown up under the action of the air box and the heat-resistant air cap, enabling the purified ash to be quickly ignited and improving the combustion efficiency of the purified ash. Moreover, the purified ash input from the bottom end of the secondary lower ash pipe, due to its small quantity and proximity to the coal feeding pipe, will be ignited first, causing the temperature in the combustion chamber to rise, which further facilitates the ignition of the purified ash input from the bottom end of the main ash pipe. The structure is simple and efficient, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 is the overall structural view of the present utility model;
[0023] Figure 2 is the top view of the present utility model.
[0024] In the figure: 1. Furnace body; 101. Combustion chamber; 102. Settling chamber; 2. Fire wall; 201. First inclined plane; 202. Inclination angle; 3. Air box; 301. Heat-resistant air cap; 4. Slag discharge port; 5. Coal feeding pipe; 6. Main ash inlet pipe; 601. Cut-off valve; 602. Main ash pipe; 603. Secondary lower ash pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts belong to the protection scope of the present utility model.
[0026] Referring to Figure 1 and Figure 2 as shown, the present utility model provides a technical solution for a fluidized bed furnace for purifying and dust-removing ash in a calcium carbide incineration system:
[0027] Referring to Figure 1 as shown, a fluidized bed furnace for purifying and dust-removing ash in a calcium carbide incineration system includes a furnace body 1. A fireproof wall 2 is arranged inside the furnace body 1, which divides the interior of the furnace body 1 into a combustion chamber 101 and a settling chamber 102. The fireproof wall 2 includes a first inclined surface 201 arranged on its lower side wall, and the surface of the first inclined surface 201 is smoothly arranged. Among them, it should be added that the smooth arrangement means that the surface of the first inclined surface 201 is relatively smooth.
[0028] By smoothly arranging the surface of the first inclined surface 201, it is ensured that the purified ash is not easily caked on the surface of the first inclined surface 201 during combustion, and thus does not go out due to lack of oxygen, reducing the combustion efficiency of the purified ash.
[0029] Furthermore, a wind box 3 and a slag discharge port 4 are arranged at the bottom of the combustion chamber 101. A plurality of heat-resistant wind caps 301 are arranged on the top of the wind box 3. Among them, it should be noted that both the wind box 3 and the heat-resistant wind caps 301 are prior arts and will not be elaborated here. A ash feeding assembly is arranged on the side wall of the furnace body 1. The ash feeding assembly includes an ash inlet main pipe 6, a stop valve 601, a main ash pipe 602 and a secondary ash discharge pipe 603. Among them, it should be added that the ash inlet main pipe 6 is connected to the main ash pipe 602 and the secondary ash discharge pipe 603. Referring to Figure 2 as shown, the stop valve 601 is used to control the ash discharge amount of the secondary ash discharge pipe 603, and the bottom end of the main ash pipe 602 is located directly above the heat-resistant wind cap 301. A coal feeding pipe 5 is arranged on the side wall of the furnace body 1 close to the combustion chamber 101. There are two secondary ash discharge pipes 603, which are symmetrically arranged on both sides of the coal feeding pipe 5.
[0030] Through the setting of the ash feeding component, the secondary ash feeding pipe 603 is distributively arranged on both sides of the coal feeding pipe 5. This not only reduces the amount of purified ash entering the combustion chamber 101 from the main ash pipe 602, but also makes the purified ash input from the bottom end of the main ash pipe 602 easier to be blown up under the action of the air box 3 and the heat-resistant air cap 301, so that the purified ash can be quickly ignited, improving the combustion efficiency of the purified ash. Moreover, since the amount of purified ash input from the bottom end of the secondary ash feeding pipe 603 is small and close to the coal feeding pipe 5, it will be ignited first, thereby increasing the temperature in the combustion chamber 101, which further helps to ignite the purified ash input from the bottom end of the main ash pipe 602. The structure is simple and efficient, and is suitable for popularization and use.
[0031] Among them, it should be supplemented that the included angle between the first inclined surface 201 and the vertically upward direction is set as the inclination angle 202, and the angle range of the inclination angle 202 is from 25 degrees to 30 degrees. Through such a setting, the first inclined surface 201 is steeper, making its surface less likely to form a crust. There are two slag discharge ports 4, and the diameter range of the slag discharge ports 4 is from 133 mm to 150 mm. Through such a setting, the impurities in the combustion chamber 101 can be quickly discharged, avoiding affecting the combustion of the purified ash. The distance between the bottom end of the main ash pipe 602 and the heat-resistant air cap 301 is from 50 mm to 125 mm. The air box 3 is located at the center of the bottom of the combustion chamber 101. The horizontal distance between the secondary ash feeding pipe 603 and the coal feeding pipe 5 is from 200 mm to 240 mm. The secondary ash feeding pipe 603 and the coal feeding pipe 5 are located on the same side wall of the furnace body 1. The coal feeding pipe 5 obliquely penetrates the side wall of the furnace body 1 downward, and the main ash pipe 602 and the secondary ash feeding pipe 603 obliquely penetrate the side wall of the furnace body 1 downward. Through such a setting, it is easier to feed the purified ash into the combustion chamber 101.
[0032] Working principle: When this device is in use, as shown in Figure 2 shown, the purified ash is blown into from the port of the main ash inlet pipe 6 and is input into the combustion chamber 101 through the main ash pipe 602. The user controls the amount of purified ash input into the combustion chamber 101 from the secondary ash feeding pipe 603 through the stop valve 601. After the coal input into the combustion chamber 101 from the coal feeding pipe 5 is ignited, it will quickly ignite the small amount of purified ash input into the combustion chamber 101 from the secondary ash feeding pipe 603, causing the temperature in the combustion chamber 101 to rise rapidly. The heat-resistant air cap 301 blows up the purified ash input into the combustion chamber 101 from the main ash pipe 602, making it ignited and fully burned. During the process of burning the purified ash, due to the smooth and steep surface of the first inclined surface 201, the purified ash is not easy to form a crust and go out on the first inclined surface 201.
[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A fluidized bed furnace for purifying dust ash from a calcium carbide incineration system, comprising a furnace body (1), wherein a fire baffle wall (2) is provided inside the furnace body (1) to divide the interior of the furnace body (1) into a combustion chamber (101) and a settling chamber (102), wherein: The fire retaining wall (2) comprises a first inclined surface (201) arranged on a lower side wall thereof, and the surface of the first inclined surface (201) is arranged to be smooth; A wind box (3) and a slag outlet (4) are provided at the bottom of the combustion chamber (101), and a plurality of heat-resistant wind caps (301) are provided at the top of the wind box (3); The side wall of the furnace body (1) is provided with an ash lowering assembly, the ash lowering assembly comprising an ash inlet main pipe (6), a stop valve (601), a main ash pipe (602) and a secondary ash lowering pipe (603); The ash inlet main pipe (6) is connected to the main ash pipe (602) and the secondary ash pipe (603); the stop valve (601) is used to control the ash discharge amount of the secondary ash pipe (603); the bottom end of the main ash pipe (602) is located directly above the heat-resistant hood (301); A coal lowering pipe (5) is provided on the side wall of the furnace body (1) close to the combustion chamber (101); The secondary ash lowering pipes (603) are provided in two pieces, and are symmetrically arranged on both sides of the lower coal pipe (5).
2. A fluidized bed furnace for purifying dust ash from a calcium carbide incineration system according to claim 1, characterized in that: The angle between the first inclined surface (201) and the vertical upward direction is set as an inclination angle (202), and the angle range of the inclination angle (202) is 25 degrees to 30 degrees.
3. A fluidized bed furnace for purifying dust ash from a calcium carbide incineration system according to claim 1, characterized in that: Two slag lower openings (4) are provided, and the diameter of the slag lower openings (4) ranges from 133 mm to 150 mm.
4. A fluidized bed furnace for purifying dust ash from a calcium carbide incineration system according to claim 1, characterized in that: The distance between the bottom end of the main ash pipe (602) and the heat-resistant wind cap (301) is 50 mm to 125 mm.
5. A fluidized bed furnace for purifying dust ash from a calcium carbide incineration system according to claim 1, characterized in that: The wind box (3) is located at the bottom center of the combustion chamber (101).
6. A fluidized bed furnace for purifying dust ash from a calcium carbide incineration system according to claim 1, characterized in that: The horizontal distance between the secondary ash lower pipe (603) and the coal lower pipe (5) is 200 mm to 240 mm.
7. A fluidized bed furnace for purifying dust ash from a calcium carbide incineration system according to claim 1, characterized in that: The secondary ash lowering pipe (603) and the coal lowering pipe (5) are located on the same side wall of the furnace body (1).
8. A fluidized bed furnace for purifying dust ash from a calcium carbide incineration system according to claim 1, characterized in that: The coal lowering pipe (5) obliquely passes through the side wall of the furnace body (1) downwardly, and the main ash pipe (602) and the secondary ash lowering pipe (603) obliquely pass through the side wall of the furnace body (1) downwardly.